Unmanned aerial vehicle, remote controller and control method therefor

An unmanned aerial vehicle, a remote controller and a control method therefor. The unmanned aerial vehicle (1) sends a signal to a remote controller (2) via a first communication network, receives a first signal switching instruction from the remote controller (2), and switches from the first communication network to a second communication network according to the first signal switching instruction, so as to send the signal to the remote controller (2). The remote controller (2) receives the first signal switching instruction generated by a user operation, and switches from the first communication network to the second communication network according to the first signal switching instruction so as to send the signal to the unmanned aerial vehicle (1). The unmanned aerial vehicle (1) and the remote controller (2) respectively have two transceivers in order to communicate with each other via the first communication network and the second communication network.